Read 'bindsym' rather than the old 'wheel_up_cmd' and 'wheel_down_cmd' directives in i3bar and call the command if specified.

The old directives are still read for transitional support which can be removed in a future version.

i3bar/include/config.h

@@ -22,10 +22,16 @@ typedef enum { M_DOCK = 0,
                M_HIDE = 1,
                M_INVISIBLE = 2 } bar_display_mode_t;
 
+typedef struct mouse_command_t {
+    int button;
+    char *command;
+
+    TAILQ_ENTRY(mouse_command_t) commands;
+} mouse_command_t;
+
 typedef struct config_t {
     int modifier;
-    char *wheel_up_cmd;
-    char *wheel_down_cmd;
+    TAILQ_HEAD(mouse_commands_head, mouse_command_t) mouse_commands;
     position_t position;
     int verbose;
     struct xcb_color_strings_t colors;

i3bar/src/config.c

@@ -20,6 +20,7 @@
 #include "common.h"
 
 static char *cur_key;
+static bool parsing_mouse_commands;
 
 /*
  * Parse a key.
@@ -34,6 +35,14 @@ static int config_map_key_cb(void *params_, const unsigned char *keyVal, size_t
     strncpy(cur_key, (const char *)keyVal, keyLen);
     cur_key[keyLen] = '\0';
 
+    if (strcmp(cur_key, "mouse_commands") == 0)
+        parsing_mouse_commands = true;
+
+    return 1;
+}
+
+static int config_end_map_cb(void *params_) {
+    parsing_mouse_commands = false;
     return 1;
 }
 
@@ -63,6 +72,25 @@ static int config_string_cb(void *params_, const unsigned char *val, size_t _len
     if (!strcmp(cur_key, "id") || !strcmp(cur_key, "socket_path"))
         return 1;
 
+    if (parsing_mouse_commands) {
+        int button = atoi(cur_key + sizeof("button") - 1);
+
+        mouse_command_t *current;
+        TAILQ_FOREACH(current, &(config.mouse_commands), commands) {
+            if (current->button == button) {
+                FREE(current->command);
+                sasprintf(&(current->command), "%.*s", len, val);
+                return 1;
+            }
+        }
+
+        mouse_command_t *command = scalloc(sizeof(mouse_command_t));
+        command->button = button;
+        sasprintf(&(command->command), "%.*s", len, val);
+        TAILQ_INSERT_TAIL(&(config.mouse_commands), command, commands);
+        return 1;
+    }
+
     if (!strcmp(cur_key, "mode")) {
         DLOG("mode = %.*s, len = %d\n", len, val, len);
         config.hide_on_modifier = (len == 4 && !strncmp((const char *)val, "dock", strlen("dock")) ? M_DOCK
@@ -112,17 +140,25 @@ static int config_string_cb(void *params_, const unsigned char *val, size_t _len
         return 1;
     }
 
+    /* This key was sent in <= 4.10.2. We keep it around to avoid breakage for
+     * users updating from that version and restarting i3bar before i3. */
     if (!strcmp(cur_key, "wheel_up_cmd")) {
         DLOG("wheel_up_cmd = %.*s\n", len, val);
-        FREE(config.wheel_up_cmd);
-        sasprintf(&config.wheel_up_cmd, "%.*s", len, val);
+        binding_t *binding = scalloc(sizeof(binding_t));
+        binding->input_code = 4;
+        sasprintf(&(binding->command), "%.*s", len, val);
+        TAILQ_INSERT_TAIL(&(config.bindings), binding, bindings);
         return 1;
     }
 
+    /* This key was sent in <= 4.10.2. We keep it around to avoid breakage for
+     * users updating from that version and restarting i3bar before i3. */
     if (!strcmp(cur_key, "wheel_down_cmd")) {
         DLOG("wheel_down_cmd = %.*s\n", len, val);
-        FREE(config.wheel_down_cmd);
-        sasprintf(&config.wheel_down_cmd, "%.*s", len, val);
+        binding_t *binding = scalloc(sizeof(binding_t));
+        binding->input_code = 5;
+        sasprintf(&(binding->command), "%.*s", len, val);
+        TAILQ_INSERT_TAIL(&(config.bindings), binding, bindings);
         return 1;
     }
 
@@ -237,6 +273,7 @@ static yajl_callbacks outputs_callbacks = {
     .yajl_null = config_null_cb,
     .yajl_boolean = config_boolean_cb,
     .yajl_string = config_string_cb,
+    .yajl_end_map = config_end_map_cb,
     .yajl_map_key = config_map_key_cb,
 };
 
@@ -249,6 +286,8 @@ void parse_config_json(char *json) {
     yajl_status state;
     handle = yajl_alloc(&outputs_callbacks, NULL, NULL);
 
+    TAILQ_INIT(&(config.mouse_commands));
+
     state = yajl_parse(handle, (const unsigned char *)json, strlen(json));
 
     /* FIXME: Proper error handling for JSON parsing */

i3bar/src/xcb.c

@@ -468,20 +468,23 @@ void handle_button(xcb_button_press_event_t *event) {
         return;
     }
 
+    /* If a custom command was specified for this mouse button, it overrides
+     * the default behavior. */
+    mouse_command_t *command;
+    TAILQ_FOREACH(command, &(config.mouse_commands), commands) {
+        if (command->button != event->detail)
+            continue;
+
+        i3_send_msg(I3_IPC_MESSAGE_TYPE_COMMAND, command->command);
+        return;
+    }
+
     switch (event->detail) {
         case 4:
             /* Mouse wheel up. We select the previous ws, if any.
              * If there is no more workspace, don’t even send the workspace
              * command, otherwise (with workspace auto_back_and_forth) we’d end
              * up on the wrong workspace. */
-
-            /* If `wheel_up_cmd [COMMAND]` was specified, it should override
-             * the default behavior */
-            if (config.wheel_up_cmd) {
-                i3_send_msg(I3_IPC_MESSAGE_TYPE_COMMAND, config.wheel_up_cmd);
-                return;
-            }
-
             if (cur_ws == TAILQ_FIRST(walk->workspaces))
                 return;
 
@@ -492,14 +495,6 @@ void handle_button(xcb_button_press_event_t *event) {
              * If there is no more workspace, don’t even send the workspace
              * command, otherwise (with workspace auto_back_and_forth) we’d end
              * up on the wrong workspace. */
-
-            /* if `wheel_down_cmd [COMMAND]` was specified, it should override
-             * the default behavior */
-            if (config.wheel_down_cmd) {
-                i3_send_msg(I3_IPC_MESSAGE_TYPE_COMMAND, config.wheel_down_cmd);
-                return;
-            }
-
             if (cur_ws == TAILQ_LAST(walk->workspaces, ws_head))
                 return;